Chicago Cubs relief pitcher Justin Grimm pauses on the mound during the twelfth inning of a baseball game against the St. Louis Cardinals, Tuesday, May 13, 2014, in St. Louis. (AP Photo/Scott Kane)
Chicago Cubs starting pitcher Jake Arrieta throws during the first inning of a baseball game against the St. Louis Cardinals on Tuesday, May 13, 2014, in St. Louis. (AP Photo/Scott Kane)
St. Louis Cardinals starting pitcher Adam Wainwright throws during the first inning of a baseball game against the Chicago Cubs on Tuesday, May 13, 2014, in St. Louis. (AP Photo/Scott Kane)
St. Louis Cardinals right fielder Allen Craig stands at the wall after he was unable to catch a two-run home run hit by Chicago Cubs' Luis Valbuena during the third inning of a baseball game Tuesday, May 13, 2014 , in St. Louis. (AP Photo/Scott Kane)
Chicago Cubs' Welington Castillo breaks his bat as he hits a single during the sixth inning of a baseball game against the St. Louis Cardinals on Tuesday, May 13, 2014, in St. Louis. (AP Photo/Scott Kane)
St. Louis Cardinals' Peter Bourjos steals third as Chicago Cubs third baseman Luis Valbuena is late with the tag during the sixth inning of a baseball game Tuesday, May 13, 2014, in St. Louis. (AP Photo/Scott Kane)
St. Louis Cardinals' Jhonny Peralta follows through on an RBI single during the sixth inning of a baseball game against the Chicago Cubs on Tuesday, May 13, 2014, in St. Louis. (AP Photo/Scott Kane)
St. Louis Rams seventh-round draft pick Michael Sam listens to a question during a news conference at the NFL football team's practice facility Tuesday, May 13, 2014, in St. Louis. (AP Photo/Jeff Roberson)